Vapor electric apparatus.



L. E. DEMPSTER. VAPOR ELECT .APPL

Patented 0st. 20, 1908.

LEONARD ERNEST DEMPSTER, OF SCHENECTADY, NEW

ELECTRIC OOMPAN Y YOR A CORPORATION OF N VAPOR ELE CTRIG APPARATUS.

K, ASSIGNOR T0 GENERAL EW YORK.

No. 901,427. Specification 01' Letters Patent.

-Pa.tented Oct. 20, 1908. Application filed October 31, 1904. Serial No.280,683.

To all whom it may concern: engagement with the thin metal caps.

Upon

Be it known that I, LEONA ERNEST I cooling, the caps contract tightlyabout the EMPSJEK, a subject of the King of Great {5 1 and f rm aperfect Vacuum-tight joint ritain, residing at Schenectady, county of ltherewith. Schenectady, State of New ork, av inv The conductors 10 and11 are not fastened vented certain new and useful Improvements directlyto their respective caps but are rivin apor Electric Apparatus, of whichthe eted or otherwise secured to disks about each following is aspecification. of which a cap is spun so as to form a rigid he lnventionherein described relates more especially to vapor electric apparatus 8 cp -1 WhlCh isshown in section, it Wlll and comprises means associatedwith said a e hat he upper end of the same 18 paratus for disslnatln hcagenerated therespun or compressed about a disk 16 to which 111 so as toimpime the operation thereof. th onduc or ll 1' attached by rlveting 0rothis en myinvention compiises various th rwis The conductors 10 and 11are eatures of novelty which I have endeavored surrounded forpractically their entire to point out with particularity in the aplengthwith bodies of glass 17 and 18. This pended claims. glass is of softcharacter and constitutes a operation of mv invention will be better un111g been p aced on the Wire the glass is erstood by reference to thefollowing de heated up until it becomes soft an a wire scription ta (enin connection with the ac of smal lameter is then wound helicall companin drawings which represent b about the same as indicated in externalview way of illustration, a mercury vapor rectifier at 19 in e case ofthe conductor 10, and in 0 which my invention is applied. sectional viewat 20 in the case of the similar drawings, an exhausted receptacle wire18 wound so of the rectifier is 1nd as to sink into the surface of theglass and,

tive electrode, usually known as the cathode after the winding iscompleted the lass is is shown at 2, and consists, as will be seensmoothed over so that the Wire is practically of a body of mercurycontained in a tube 3 or nearly enveloped thereby. This wire dependingfrom the main envelop 1 The which may be of copper, iron, or the likeower end of this tube is closed by a metal improves the heat-radiatingcapacity of the. cap 4, preferably of thin iron, into which the I glasssleeves and thereby helps to keep down g ass, while the parts are hot,has con blown the emperatures of the conductors l0 and I n a jacentstarting electrode 5 of mercur 11 as e case may be, and serves also inis contained by a laterally located tube 6, the case of cracking ordisintegration of the ower end of wh ch is similarly scaled b a lass, toprevent the same from falling away cap 7 iese metal caps 4 and I serveas rom and exposing the conducto cut, as a means for electrical con Therectifier to which I have shown In bodies 0 such as in ct and outletpipes 22 and 23 respectively artificial uaphite or the like, an aresuppassing through the stopper 24. T e COOllIl ported respectively by tl1e current-conveying conductors 10 and 11, which may be of iron mercuryvapor generated in the appaiatus or other suitable metal. Th seconductors and thereby enables large currents to be are located axiallyin tubes 12 and 13 which transmitted through the apparatus.

exten upward and outwardly from the to at c aim as new and desire tosecure of the bulbed portion of the receptacle 1. by etters Patent ofthe nited States 1S, hey are supported from the metal caps 14 l. Thecombination 0 a conductor and and 15 which are sealed about the ends ofa protective and radiating sleeve therefor consisting of vitreousmaterial with metal embedded therein.

e combination of a conductor, and a protective and radiating sleevetherefor, conhis sea in is done whiIe the parts are hot and by blowingthe ends of the sisting of vitreous material with wire emprotectinsleeve for said conductor con bedded therein. sisting 0' vitreousmaterial having metal in 3. The combination of a conductor, and a anelongated shape embedded therein. protective and radiating sleevetherefor, con- In witness whereof, I have hereunto set 5 sisting ofglass with a helix of Wire emmy hand this 29th day of October, 1904:. OI

bedded therein. LEONARD ERNEST DEMYSTER.

4. The combination of an envelop or con- Witnesses:

tainer, an electrode therein, a current con- BENJAMIN B. HULL, veymgconductor for said electrode, and a HELEN Onrom).

